You can use the regular timing or clock network reports to review the
clock paths and identify the situations where two clocks propagate on a same clock tree
and are used at the same time in a timing path where the startpoint and endpoint clock
pins are connected to the same clock tree. This analysis can be a time consuming task.
Instead, you can review the multiple_clock section of
the Check Timing report. This section returns a list of clock pins and their associated
timing clocks.
Based on the clock tree topology, you must apply different constraints as described in the following sections.